The fourth Summer Davos forum opens in the Chinese port city of Tianjin, Sept 13,2010. [Xinhua]

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TIANJIN - World business and political leaders attended the opening ceremony of the fourth Summer Davos forum here Monday, to discuss how to keep the economic momentum and promote sustained growth two years after the financial crisis.

Chinese Premier Wen Jiabao gave a speech at the forum, also known as the Annual Meeting of the New Champions 2010, held in the Chinese port city of Tianjin.

As one of the foremost global business gatherings in Asia, the meeting, sponsored by the Geneva-based World Economic Forum (WEF), will last till Wednesday, with the theme of "Driving Growth through Sustainability".

Although the world economy has been moving up from the recession since the financial crisis in 2008, the market is still unstable and the future uncertain. The meeting tries to sort out a solution to avert a double-dip recession.